Improvement in apparatus for stirring tan-vats



W. PIMARTIN. VAT FOR TANNING.

No. 33,203. Patented Sept. 3,'1861.

rim:

UNITED STATES PATENT OFFICE.

WILLIAM P. MARTIN, OF SALEM, MASSACHUSETTS.

IMPROVEMENT lN APPARATUS FOR STIRRING TAN-VATS.

.To all whom it may-concern.-

Be it known that I, WILLIAM'P. MARTIN, of Salem, of the county of Essex, in the State int Massachusetts, have invented a new and useful Stirring Apparatus for Vats for TanningLeather, &c.; and I do hereby declare that the following is a full and exact description thereof, reference being had to the ac-- companying drawings, making part of this application.

My invention relates'to a novel method of agitating the liquorin vats for tanning leather; and my invention consists in the employment of stationary deflecting-bars arranged in the bottom of the vat in combination with agitating-bars arranged on a sliding bar or bars-operated by a hand-lever extending up from the side of the vat, as will be all fully explained hereinafter.

To enable those skilled in the art to make and use my invention, I will proceed to describe the construction and operation of my improved apparatus, referring by letters to the accompanying drawings, in which--- Figure 1 is' a skeleton perspective view of a vat embodying my invention. Fig. 2 is a vertical longitudinal section of the same, and Fig. 3 is a vertical. lateral section ofthe same. I have shown the vat with one side broken out at Fig. 1, to illustrate more clearly the internal arrangement, and have in said figure and also in Fig. 2 shown only one set of hides to avoid complication in the drawings.

In the several figures the same letter indicates the samefparts.

A is the vat or box which contains th liquor into which the hides are immersed.

C are the hides, which are suspended over a series of bars 0, arranged longitudinally at the top of the vat and parallel with each other in a manner well known.

On the bottom or door of vat A are arranged or fixed four deflecting-bars e e ee laterally'and paralleltto each other) about,

equidistant. The central two of these bars e are each wedge or triangular-1y shaped, (in a vertical crosssection, as seen at Figs. 1 and 2, while the other two of said bars are halfwedge shaped, being in the corners of the vat, as illustrated.

b isa sliding rod, which is operated by a hand-lever g, pivoted near its centerto a stand F projecting vfrom one-side of the vat A.

On the rod 12 are secured by nuts (or otherwise) three slats or flat bars 0, arranged parallel to the bars on deflectors 6. (See Figs. 1 and 2.) By moving the upper end of the lever 9 back and forth in the directions indicated by the arrows at Fig. 2, the rod Z) will be-reoiprocated in its bearings, (formed in the deflecting-bars e,) causing the bars 0 to move back and forth between the barse. It will be observed that the hides are hung so that their lower extremities or sides do not come down to the bars or in the Way of the stirring apparatus.

The operation of the abovedescribed apparatus is thus explained briefly, so as to be fully understood, the vat being filled with the liquor and hides 0. When .it is desirable to stir up thesediment in the liquor and cause the tannin to float up to enter the pores of the hides, it is only necessary to move the handles g back and forth a few times, whereby the agitating-bars 0 will be reciprocated and the liquor agitated at the bottom of the vat.

The wedge shapeof the deflecting-bars ewill cause the sediment to be deflected upward and thrown up between the hides and into the body and upper portion of the mass of liquor.

It will be seen that by the mechanism described (which is exceedingly simple and economical) a perfect circulation through the mass of liquor of the sediment is effected at pleasure by simply moving the handle 9 at the top of the vat.

Having described the construction and 0peration of my invention, whatl claim as new, and desire to secure by Letters Patent, is

The employment in the vat A ofthe deflectingbars e and agitating-bars c, the whole constructed and operating substantially as described, for the purpose set forth.

In testimonywhereof I have hereunto set my hand this 7th day of June, 1861.

' WILLIAM F. MARTIN.

Witnesses:

FREDERICK A. FRYE, STEPHEN W. GARDNER. 

